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AT4.1 Diffusion Barrier Coatings for High Flux Nuclear Reactors

Tuesday, May 22, 2012: 8:00 AM
Room 335 C (Hilton Americas Houston )
Dr. Kendall J. Hollis , Los Alamos National Laboratory, Los Alamos, NM
Dr. Nathan A. Mara , Los Alamos National Laboratory, Los Alamos, NM
Dr. Robert D. Field , Los Alamos National Laboratory, Los Alamos, NM
Dr. Thomas A. Wynn , Los Alamos National Laboratory, Los Alamos, NM
Dr. Patricia O. Dickerson , Los Alamos National Laboratory, Los Alamos, NM
Zirconium and molybdenum metal coatings applied by low pressure plasma spraying have been investigated for use as diffusion barrier coatings on low enrichment uranium fuel for research nuclear reactors.  The coating must prevent diffusion between the aluminum cladding and the enriched uranium alloy fuel.  The interface between the coating and fuel as well as the interface between the coating and the aluminum cladding were investigated.  TEM analysis has shown a very thin interaction layer at the coating interface which is dependant on the processing conditions.  HIP bonding of the Al cladding and the interface formed with the rough plasma sprayed coating are investigated and issues concerning the bond strength are discussed. 
See more of: Nuclear, Abradable and Oxidation-Corrosion Protective Coatings
See more of: Advanced Thermal Spray Coatings